/*
 * Copyright 2009 Tran Nhut Trung.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); 
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, 
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and 
 * limitations under the License.
 */
package org.eclipse.core.databinding.observable.gwt.internal;

import com.google.gwt.user.client.ui.FocusWidget;

import org.eclipse.core.databinding.observable.gwt.internal.WidgetPropertyObservableValue;

public class EnabledObservableValue extends WidgetPropertyObservableValue {
  private FocusWidget widget;
  
  public EnabledObservableValue(FocusWidget widget) {
    super(widget, "disabled");
    
    this.widget = widget;
  }
  
  public Object getValueType() {
    return Boolean.class;
  }

  public Object doGetValue() {
    return widget.isEnabled();
  }

  protected void doSetApprovedValue(Object value) {
    try {
      updating = true;
      widget.setEnabled((Boolean)value);
      oldValue = doGetValue();
    } finally {
      updating = false;
    }
  }
}
